Musk was proposing about 1.2TW of solar capacity, the US installed about 250GW since then and is currently installing about 50GW a year and is projected to have

Musk was proposing about 1.2TW of solar capacity, the US installed about 250GW since then and is currently installing about 50GW a year and is projected to have 770GW by 2036 in a decades time. So the US is probably over-delivering compared with many things Elon has proposed delivering himself.